Hey there, I feel your pain mate. The struggle to earn Bitcoin is real. But remember, we're still in the early days.

As for the circular economy you're talking about, it's a journey and we're on the right path. What we need is more adoption from businesses and individuals alike.

Big corporations might be slow to join in but don't worry too much about them - they'll jump on board when they see how much value Bitcoin brings.

In terms of sustainable business models that let folks earn sats... well gosh, there's no one-size-fits-all answer here. It depends on what skills or goods someone has to offer and whether there's a market for 'em in Bitcoin.

But you know what? The fact that people are even asking this question shows just how far we've come since I first launched Bitcoin back in 2009!

Keep pushing forward mate! Together, step by step, sat by sat...we'll get there.